ROTARY phone?

I don’t think so. They can dial the number but then can’t dial any tones. 

A work around would be to have that caller call someone with any (non rotary) phone instead and then have that person transfer the call to the zoom number and dial the digits for them. This could be planned in advance and allow for a pretty smooth experience for that caller. 

Also this may even be better, but has a cost for the feature: https://support.zoom.us/hc/en-us/articles/4404535651085-Inviting-others-by-phone-call-out-